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/*
* [The "BSD licence"]
* Copyright (c) 2010 Ben Gruver (JesusFreke)
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.jf.dexlib.Code;
import org.jf.dexlib.Code.Format.*;
import org.jf.dexlib.DexFile;
import org.jf.dexlib.Util.ExceptionWithContext;
import org.jf.dexlib.Util.Hex;
public class InstructionIterator {
public static void IterateInstructions(DexFile dexFile, byte[] insns, ProcessInstructionDelegate delegate) {
int insnsPosition = 0;
while (insnsPosition < insns.length) {
try
{
short opcodeValue = (short)(insns[insnsPosition] & 0xFF);
if (opcodeValue == 0xFF) {
opcodeValue = (short)((0xFF << 8) | insns[insnsPosition+1]);
}
Opcode opcode = Opcode.getOpcodeByValue(opcodeValue);
Instruction instruction = null;
if (opcode == null) {
System.err.println(String.format("unknown opcode encountered - %x. Treating as nop.",
(opcodeValue & 0xFFFF)));
instruction = new UnknownInstruction(opcodeValue);
} else {
if (opcode == Opcode.NOP) {
byte secondByte = insns[insnsPosition + 1];
switch (secondByte) {
case 0:
{
instruction = new Instruction10x(Opcode.NOP, insns, insnsPosition);
break;
}
case 1:
{
instruction = new PackedSwitchDataPseudoInstruction(insns, insnsPosition);
break;
}
case 2:
{
instruction = new SparseSwitchDataPseudoInstruction(insns, insnsPosition);
break;
}
case 3:
{
instruction = new ArrayDataPseudoInstruction(insns, insnsPosition);
break;
}
}
} else {
instruction = opcode.format.Factory.makeInstruction(dexFile, opcode, insns, insnsPosition);
}
}
assert instruction != null;
delegate.ProcessInstruction(insnsPosition/2, instruction);
insnsPosition += instruction.getSize(insnsPosition/2)*2;
} catch (Exception ex) {
throw ExceptionWithContext.withContext(ex, "Error occured at code address " + insnsPosition * 2);
}
}
}
public static interface ProcessInstructionDelegate {
public void ProcessInstruction(int codeAddress, Instruction instruction);
}
}
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